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Preparation method of concrete inner curing agent with core-shell structure
The invention provides a preparation method of a concrete inner curing agent with a core-shell structure. The preparation method comprises the following steps: preparation of a core material, preparation of a shell solution, and preparation of the concrete inner curing agent. The step of preparation of the core material comprises: uniformly mixing cyclohexane and a suspending agent to obtain an oil phase; uniformly mixing acrylic acid, sodium hydroxide, a cross-linking agent, an initiator and water to obtain a water phase; heating the oil phase to 40-60 DEG C; adding the water phase drop by drop; performing a polymerization reaction for 1-4h; and drying the resultant to obtain the core material. The step of preparation of a shell solution comprises uniformly mixing polyhydric alcohol, aluminum sulfate, an epoxy compound, a catalyst and water to obtain a shell solution. The step of preparation of the concrete inner curing agent comprises: spraying the shell solution onto the surface of the core material; performing uniform mixing; and performing a heating reaction to obtain a final product. According to the invention, the preparation method is simple; the chemical structure is easy to control; the obtained concrete inner curing agent with the core-shell structure can greatly improve the moisture content of the inside of concrete, and has an obvious effect on self-constriction and shrinkage of early concrete; and the problem that the early concrete cracks is solved.
Preparation method of concrete inner curing agent with core-shell structure
The invention provides a preparation method of a concrete inner curing agent with a core-shell structure. The preparation method comprises the following steps: preparation of a core material, preparation of a shell solution, and preparation of the concrete inner curing agent. The step of preparation of the core material comprises: uniformly mixing cyclohexane and a suspending agent to obtain an oil phase; uniformly mixing acrylic acid, sodium hydroxide, a cross-linking agent, an initiator and water to obtain a water phase; heating the oil phase to 40-60 DEG C; adding the water phase drop by drop; performing a polymerization reaction for 1-4h; and drying the resultant to obtain the core material. The step of preparation of a shell solution comprises uniformly mixing polyhydric alcohol, aluminum sulfate, an epoxy compound, a catalyst and water to obtain a shell solution. The step of preparation of the concrete inner curing agent comprises: spraying the shell solution onto the surface of the core material; performing uniform mixing; and performing a heating reaction to obtain a final product. According to the invention, the preparation method is simple; the chemical structure is easy to control; the obtained concrete inner curing agent with the core-shell structure can greatly improve the moisture content of the inside of concrete, and has an obvious effect on self-constriction and shrinkage of early concrete; and the problem that the early concrete cracks is solved.
Preparation method of concrete inner curing agent with core-shell structure
ZHANG XIAOLEI (author) / LI LEI (author) / WANG WENBIN (author) / TIAN QIAN (author) / LIU JIAPING (author)
2015-07-22
Patent
Electronic Resource
English
IPC:
C08F
MACROMOLECULAR COMPOUNDS OBTAINED BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, erhalten durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C04B
Kalk
,
LIME
/
C08G
MACROMOLECULAR COMPOUNDS OBTAINED OTHERWISE THAN BY REACTIONS ONLY INVOLVING CARBON-TO-CARBON UNSATURATED BONDS
,
Makromolekulare Verbindungen, anders erhalten als durch Reaktionen, an denen nur ungesättigte Kohlenstoff-Kohlenstoff-Bindungen beteiligt sind
/
C08J
Verarbeitung
,
WORKING-UP
Preparation method of core-shell structure microgel concrete internal curing agent
| European Patent Office | 2022
| European Patent Office | 2021